From the French ‘shoulder strap’. Any mate where the checkmated King stands at the edge of the board and is flanked by two defending pieces that bar its escape.
ECHESSPEDIA
Quotes of the Day
Karpov is the official World Champion, but I’m not sure what that really means.
Jan Timman 1993
When you see a good move, look for a better one
Emanuel Lasker
it would have been a debacle if Karjakin had become the 17th World Champion.
Garry Kasparov 2016
When you see a good move, look for a better one
Emanuel Lasker
People knew about 110 years of chess history. Nowadays, nobody is able to tell you the name of the world champion of 2000.
Anatoly Karpov 2005